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July 5th, 2012, 05:02 PM
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#1 |
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Regular Crew
Join Date: Feb 2007
Location: Colorado
Posts: 88
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dc coeffieient and hi8>DV
I'm making a DVD from a marginal source hi8 capped in DV.
I believe the dc coefficient default is 9 but read to use 10. What is the dc coefficient and should I use 8, 9, or 10 when dealing with hi8>DV>mpg? Thx
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July 6th, 2012, 04:25 AM
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#2 |
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Major Player
Join Date: Dec 2007
Location: London, UK
Posts: 262
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Re: dc coeffieient and hi8>DV
I won't pretend to fully understand the complex technical explanations of how MPG compression works. Wikipedia, doom9 and videohelp.com should be great starting points if you want a deeper understanding.
The crude bottom line is that higher DC Precision = Higher quality of encoding, BUT it requires a higher bitrate. So if you use a high precision setting with too low a bitrate you may actually end up with worse quality. The general consensus AFAIK is to use 10 for bitrates > 6000, 9 for bitrates 4000-6000, 8 for <4000. Of course you should probably make your own tests... |
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July 11th, 2012, 02:51 PM
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#3 |
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Regular Crew
Join Date: Feb 2007
Location: Colorado
Posts: 88
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Re: dc coeffieient and hi8>DV
Thanks for the explaination. I used 10 for mpgs at 8000 kbps and it's a bit clearer (no pun intended).
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